Du-Bro hinge slotter takes the hassle out of slotting control surfaces for gluing hinges. The centering/parallel guide, centers hinge slotter on up to 3/4 in.(19.0mm) material. Four handle set plus guide and centering tool for three different size slotting forks: min, standard and heavy duty hinges. Designed to work with all Du-Bro hinges. The 3 slotters and the 'picker' are permanently mounted to red nylon handles. Packaged in reusable, recycable clamshell storage blister.